Collatz in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 401st m-tkach 🇺🇦 904 90 31ms 7 Dec 2023 402nd piano-miles 904 92 411ms 24 Feb 2026 403rd GolfingSuccess 🇬🇷 903 64 91ms 14 Dec 2024 403rd MeWhenI 🇻🇦 903 64 72ms 24 Dec 2024 403rd GrayJoKing 🇦🇺 903 64 72ms 25 Nov 2025 406th kg583 🇺🇸 903 77 18ms 11 Mar 2026 407th edsrzf 🇳🇿 903 83 41ms 14 Jan 2025 407th kg583 🇺🇸 903 83 42ms 14 Feb 2025 409th krcs 🇵🇱 903 86 380ms 10 May 2022 409th billings7 🇬🇧 903 86 376ms 15 May 2022 409th revlayle 🇺🇸 903 86 379ms 7 Dec 2022 409th albanian-laundromat 🇺🇸 903 86 430ms 30 Sep 2025 413th Betuaredead 902 60 4ms 5 Jan 2023 413th Yewzir 🇧🇪 902 60 4ms 12 Feb 2023 413th Steffan153 🇫🇮 902 60 4ms 23 Feb 2023 413th GolfingSuccess 🇬🇷 902 60 4ms 16 Oct 2024 413th sean-niemann 🇺🇸 902 60 9ms 7 Mar 2025 418th shellbertt 🇨🇦 902 62 21ms 4 May 2022 418th ZakkkkAttackkkk 🇵🇭 902 62 21ms 5 May 2022 418th annaproxy 902 62 21ms 8 Jun 2022 418th bob-th 902 62 21ms 9 Jul 2022 418th btjones0 902 62 27ms 15 Jul 2022 418th tri1212 🇻🇳 902 62 21ms 18 Jul 2022 418th fredrik-bakke 🇳🇴 902 62 21ms 5 Oct 2022 418th jakobkordez 🇸🇮 902 62 19ms 19 Oct 2022 418th Fishron 902 62 20ms 29 Nov 2022 418th KatieLG 🇬🇧 902 62 24ms 11 Dec 2022 418th ItsMeNoobieboy 902 62 19ms 20 Dec 2022 418th firegene 🇮🇪 902 62 21ms 3 Jan 2023 418th ljweel 902 62 20ms 13 Feb 2023 418th 2011-Chan-Ethan 902 62 21ms 9 Jul 2023 418th elgan65536 🇺🇸 902 62 23ms 18 Nov 2023 418th Dataen 902 62 19ms 16 Jan 2024 418th Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 418th cuboids 902 62 21ms 11 Jul 2024 418th wuzekai518 902 62 25ms 26 Jul 2024 418th abhishekg999 902 62 49ms 17 Sep 2024 418th lifthrasiir 🇰🇷 902 62 21ms 16 Nov 2024 418th Artemis21 🇬🇧 902 62 22ms 17 Jan 2025 418th lolgeny 902 62 20ms 22 Feb 2025 418th keelimeguy 🇺🇸 902 62 20ms 15 May 2025 418th DoubleUynn 902 62 22ms 25 Jun 2025 418th madeforlosers 902 62 22ms 2 days ago 444th Kacarott 🇦🇺 902 79 121ms 13 Jun 2024 445th MeWhenI 🇻🇦 901 63 191ms 5 May 2022 446th Lydxn 🇨🇦 901 64 181ms 1 Apr 2023 447th stefangimmillaro 901 92 130ms 24 Oct 2023 447th inverseLorentz 🇦🇺 901 92 120ms 27 May 2024 447th sean-niemann 🇺🇸 901 92 129ms 8 Jun 2025 447th ian-h-chamberlain 🇺🇸 901 92 140ms 23 Nov 2025 451st michael-pruglo 🇺🇦 901 94 58ms 5 Jul 2022 451st zygoloid 901 94 59ms 5 Aug 2024 451st AdrienHache 🇫🇷 901 94 57ms 27 Dec 2025 454th Steffan153 🇫🇮 900 82 42ms 1 Apr 2023 454th sean-niemann 🇺🇸 900 82 42ms 12 Jul 2024 456th Lydxn 🇨🇦 899 49 37ms 4 May 2022 456th JayXon 🇺🇸 899 49 37ms 17 Oct 2022 456th GrayJoKing 🇦🇺 899 49 37ms 15 Nov 2022 456th radarek 🇵🇱 899 49 192ms 26 Aug 2025 460th Lydxn 🇨🇦 899 70 96ms 7 May 2022 461st MeWhenI 🇻🇦 899 71 139ms 20 Aug 2024 462nd m-tkach 🇺🇦 899 72 110ms 16 Oct 2022 462nd GrayJoKing 🇦🇺 899 72 118ms 22 Oct 2022 462nd emplv 🇱🇻 899 72 110ms 27 Oct 2022 462nd sean-niemann 🇺🇸 899 72 124ms 7 Mar 2025 466th DialFrost 🇸🇬 898 74 17ms 22 Feb 2026 466th Steffan153 🇫🇮 898 74 17ms 22 Feb 2026 466th GrayJoKing 🇦🇺 898 74 16ms 22 Feb 2026 466th GolfingSuccess 🇬🇷 898 74 16ms 24 Feb 2026 466th snoozingnewt 🇨🇦 898 74 16ms 4 Mar 2026 466th edsrzf 🇳🇿 898 74 16ms 9 Mar 2026 472nd GrayJoKing 🇦🇺 897 74 66ms 1 Nov 2023 473rd albanian-laundromat 🇺🇸 897 106 329ms 22 Dec 2025 474th Lydxn 🇨🇦 896 69 6ms 12 Sep 2022 474th GrayJoKing 🇦🇺 896 69 7ms 12 Sep 2022 474th btnlq 896 69 7ms 24 Sep 2022 477th trinityy-7 895 69 2ms 7 Aug 2025 478th Steffan153 🇫🇮 894 67 110ms 18 Dec 2022 478th Lydxn 🇨🇦 894 67 118ms 4 Feb 2023 478th DialFrost 🇸🇬 894 67 98ms 17 Mar 2025 First Prev 401–480 of 3,704 Next Last